layout/scrolling: handle fullscreen manually (#14190)

Makes scroll handle fullscreen by itself, allowing for fs scrolls.

1 files changed, 13 insertions, 0 deletions

diff --git a/src/layout/algorithm/ModeAlgorithm.hpp b/src/layout/algorithm/ModeAlgorithm.hpp
index e53d4391..1348a6f4 100644
--- a/src/layout/algorithm/ModeAlgorithm.hpp
+++ b/src/layout/algorithm/ModeAlgorithm.hpp
@@ -13,6 +13,12 @@ namespace Layout {
     class ITarget;
     class CAlgorithm;
 
+    struct SFullscreenRequest {
+        SP<ITarget>     target;
+        eFullscreenMode currentEffectiveMode = static_cast<eFullscreenMode>(0);
+        eFullscreenMode effectiveMode        = static_cast<eFullscreenMode>(0);
+    };
+
     class IModeAlgorithm {
       public:
         virtual ~IModeAlgorithm() = default;
@@ -44,6 +50,13 @@ namespace Layout {
         // optional: predict new window's size
         virtual std::optional<Vector2D> predictSizeForNewTarget();
 
+        // optional: allow algorithms to own fullscreen semantics for a target.
+        virtual eFullscreenRequestResult requestFullscreen(const SFullscreenRequest& request);
+
+        // optional: expose an algorithm-owned fullscreen target and whether it is monitor-exclusive.
+        virtual SP<ITarget> layoutFullscreenTarget() const;
+        virtual bool        layoutFullscreenCoversMonitor() const;
+
         // Impl'd here: focal point for dir
         virtual std::optional<Vector2D> focalPointForDir(SP<ITarget> t, Math::eDirection dir);